X-Git-Url: http://git.pippins.net/embedvideo/.git/?a=blobdiff_plain;f=main.cpp;h=945cc0d0b36c91de96147dddb469355a87e89d75;hb=8482590d4b4c8158ba05815c8f62c74a4d5a591f;hp=07868bcd65199d14e2a43da88dbf3740018bb672;hpb=3a93fc06d34d4a2a577ff53fa9e6321598d8f9fd;p=backups%2F.git

diff --git a/main.cpp b/main.cpp
index 07868bc..945cc0d 100644
--- a/main.cpp
+++ b/main.cpp
@@ -9,6 +9,9 @@
 
 using namespace std;
 
+static const unsigned int bytes_in_block = 0x800;
+static const char * dbname = "/var/tmp/backups.db";
+
 unsigned long long current_time() {
   unsigned long long rc = 0;
   time_t now_tt = time( 0 );
@@ -23,19 +26,17 @@ unsigned long long current_time() {
   return rc;
 }
 
-template<class I, class O>
-bool copy_until_full( I begin, I end, O out, unsigned long long &space ) {
-  const unsigned long long block_size = 0x200ULL;
+template<class I, class O, class INT>
+bool copy_until_full( I begin, I end, O out, INT &space ) {
   bool complete = true;
 
   I i = begin;
   while( 0 != space && i != end ) {
-    unsigned long long size = (*i)->getFileSize();
-    unsigned long long blocks = size & ( ~(block_size-1) );
-    if( blocks < size ) blocks += block_size;
+    INT size = (*i)->getFileSize();
+    INT blocksize = blocks( size ) * bytes_in_block;
 
-    if( blocks <= space ) {
-      space -= blocks;
+    if( blocksize <= space ) {
+      space -= blocksize;
       out = *i;
       ++out;
     } else {
@@ -86,13 +87,35 @@ void partition_sets( const SET &current, const SET &old,
                   cmp );
 }
 
+template<class INT>
+INT blocks( const INT &bytes ) {
+  INT numblocks = bytes / bytes_in_block;
+  if( 0 != bytes % bytes_in_block ) numblocks++;
+
+  return numblocks;
+}
+
+template<class ITER, class INT>
+void sizes( ITER begin, const ITER &end, INT &numblocks, INT &numbytes ) {
+  numblocks = 0;
+  numbytes  = 0;
+
+  while( begin != end ) {
+    INT filesize = (*begin)->getFileSize();
+
+    numbytes  += filesize;
+    numblocks += blocks( filesize );
+    begin++;
+  }
+}
+
 int main() {
   // Parse the list of current files on stdin
   file_set current;
   populate_set( cin, current );
 
   file_set backed_up;
-  ifstream db( "test.db" );
+  ifstream db( dbname );
   if( db && db.good() ) {
     populate_set( db, backed_up );
   }
@@ -103,18 +126,30 @@ int main() {
 
   // Now find the list of files to backup.
   file_set backups;
+  insert_iterator<file_set> backups_i( backups, backups.begin() );
 
   // backup all added files
-  copy( added.begin(), added.end(), inserter( backups, backups.begin() ) );
+  copy( added.begin(), added.end(), backups_i );
+
+  // Track the total size of added files
+  unsigned long long added_blocks, added_bytes;
+  sizes( backups.begin(), backups.end(), added_blocks, added_bytes );
 
+  file_vector modified_files;
   // Backup files that have been modified
   file_set::iterator i = common.begin(), j = old_common.begin();
   for( ; i != common.end(); ++i, ++j ) {
     (*i)->setLastBackupDate( (*j)->getLastBackupDate() );
 
-    if( needs_backup( *j, *i ) ) backups.insert( *i );
+    if( needs_backup( *j, *i ) ) modified_files.push_back( *i );
   }
 
+  copy( modified_files.begin(), modified_files.end(), backups_i );
+
+  // Track the total size of modified files
+  unsigned long long modified_blocks, modified_bytes;
+  sizes( modified_files.begin(), modified_files.end(), modified_blocks, modified_bytes );
+
   // Now, sort the backups by filesize and build a list that'll fit on a DVD
   file_vector backups_s;
   copy( backups.begin(), backups.end(), back_inserter( backups_s ) );
@@ -123,7 +158,7 @@ int main() {
   sort( backups_s.begin(), backups_s.end(), sizecmp );
 
   file_set final;
-  unsigned long long space = 0x107c00000ULL;  // 4220 MBytes
+  unsigned long long space = 0x100000000ULL; // After looking at how big the ISO can be and how many 1K blocks are left after formatting the filesystem I decided on an even 4GB target
 
   insert_iterator<file_set> final_i( final, final.begin() );
 
@@ -133,6 +168,10 @@ int main() {
                                    final_i,
                                    space );
 
+  // Track the size filled up by essential backups
+  unsigned long long essential_blocks, essential_bytes;
+  sizes( final.begin(), final.end(), essential_blocks, essential_bytes );
+
   // Now, sort the non-backed-up list by last_backup_date and back-fill
   if( 0 != space ) {
     file_vector leftovers;
@@ -148,19 +187,35 @@ int main() {
     copy_until_full( leftovers.begin(), leftovers.end(), final_i, space );
   }
 
+  // Track the total size to be copied to the dvd
+  unsigned long long total_blocks, total_bytes;
+  sizes( final.begin(), final.end(), total_blocks, total_bytes );
+
   unsigned long long now = current_time();
   for( file_set::iterator k = final.begin(); k != final.end(); ++k ) {
     (*k)->setLastBackupDate( now );
   }
 
   // Write the 'current' list to the dbfile
-  ofstream dbout( "test.db" );
+  ofstream dbout( dbname );
   copy( current.begin(), current.end(), ostream_iterator<FileData*>( dbout, "" ) );
 
   // Write the 'final' list to stdout
   copy( final.begin(), final.end(), ostream_iterator<FileData*>( cout, "" ) );
 
-  if( ! complete ) { cerr << "incomplete" << endl; }
+  cerr << "Need backing up..." << endl;
+  cerr << "	Added Bytes:		" << added_bytes << endl;
+  cerr << "	Added Blocks:		" << added_blocks << endl;
+  cerr << "	Modified Bytes:		" << modified_bytes << endl;
+  cerr << "	Modified Blocks:	" << modified_blocks << endl << endl;
+
+  cerr << "Will be backed up..." << endl;
+  cerr << "	Essential Bytes:	" << essential_bytes << endl;
+  cerr << "	Essential Blocks:	" << essential_blocks << endl;
+  cerr << "	Total Bytes:		" << total_bytes << endl;
+  cerr << "	Total Blocks:		" << total_blocks << endl << endl;
+
+  if( ! complete ) { cerr << "Backup is incomplete!" << endl; }
 
   // Clean-up
   for( file_set::iterator i = backed_up.begin(); i != backed_up.end(); ++i ) { delete *i; }